Holy bat poop Batman, TWENTY SIX DOLLARS! Go to the most expensive hardware store in your area and and buy the appropriate number of pan head 3/4 inch number 10 stainless steel screws and washers and install with them. Save about $22. Plus you can pick your own head style, philipps, torax, robertson. Can drill the holes to install or buy self tapping screws.
Or you could buy zinc plated #10 X 3/4 truss head screws, these also come in self tapping. Cheaper but will rust over time. The larger head or washer is to keep the screw from working through the plastic over time.